On several new or poorly-known Oriental Paradoxosomatidae (Diplopoda: Polydesmida), XXVII

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Arthropoda Selecta

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28(4): 459-478

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Abstract

This contribution is devoted to new records of eight known species, including three that are illustrated based on fresh material. A new genus and five new species are described: Margaritosoma novaeguineae sp.n. from western New Guinea, the easternmost representative of the basically Sunda genus Margaritosoma, as well as Tylopus nguyeni sp.n., Parasundanina faillei gen.n., sp.n., Hylomus srisonchaii sp.n. and H. propinquus sp.n., all from northern Vietnam. Parasundanina gen.n. differs from all nine presently known genera of the tribe Sundaninini except Arthrogonopus by the distinct, lateral, distofemoral sulcus on the gonopodal telopodite that delimits a postfemoral part, from Arthrogonopus, with six species endemic to Borneo, by the presence of a well-developed, ventral, postfemoral process, coupled with both laminae of the solenophore being rather evident and partly sheathing a long and flagelliform solenomere, with its tip exposed on the lateral side. The new genus also comprises P. medialis (Nguyen, 2010), comb.n. ex Sundanina Attems, 1914. Both Hylomus srisonchaii sp.n. and H. propinquus sp.n. seem to be troglobites that show conspicuous traits of troglomorphism.